Unit for inspecting a surface



FIG. 1 is a front perspective view of a unit for inspecting a surface showing my new design, the cord is drawn broken away for ease of illustration;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a front perspective with the cover open thereof. 

The ornamental design for a unit for inspecting a surface, as shown and described. 